What is a ligand ? Give example of bidentate ligand.

Explanation

Ligands : The neutral molecules or negatively charged anions (or rarely positive ions) which are bonded by coordinate bonds to the central metal atom or ion in a coordination compound are called ligands or donor groups. For example in `[Cu(CN)_(4)]^(2-),` four `CN^(-)` ions arre ligands coordinated to central metal ion `Cu^(2+)`.